As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOTHROTTLE INOP. GROUNDED - YES. AUTOTHROTTLE BITE PER B737-800 FIM 22-31 TASK 801 - BITE SHOWED 22-31687 "ASM-1 RATE MONITOR" FAULT. ACCOMPLISHED T/S FOR FAULT 22-31687 PER FIM 22-32 TASK 819 - INITIAL EVALUATION DID NOT CONFIRM FAULT. PERFORMED AUTOTHROTTLE SYSTEM TEST AND SERVO MOTOR TEST PER B737-800 AMM 22-31-00-710-802 - ALL TESTS PASS.